Disking device



3Q, 1949. -1 M, HARQRAVE 2,188,435 DISKING DEVICE Filed Nov. 23, 1936 3heets-sheet 1 ATTORNEY.

INVENT OR. FRED M 17414 6754 Vi I BY ian. 30, F. M. HARGRAVE DISKINGDEVICE v 3 Sheets-Sheet 2 Filed Nov. 23, 1936 INVENTOR.

FRED M. HARa/PA V15 BY 2 fiiwmfi a ATTORNEY.

F. M. HARGRAVE DISKING DEVICE Filed NOV. 25, 1936 3 Sheets-Sheet 3INVENTOR.

F/PZD M A ARGPAVE 'BY Z ATTORNEY.

Patented Jan. 30, 1940 UNITED stares rarest oer-r g v 2,188,435 DISK'INGDEVICE Fred M. Hargrave, Cedar Rapids, Iowa- Application November, 23,1936, Serial No. 112,201

7 Claims.- (01.; 37-445 v I It is another general object 'of myinvention This invention relates to grader planersor disking machinesand has particular relation to means for attaching a disking device to.a supporting and actuating structure such as a grader, a motor patrolor the like. I

It has been found that disking means, such as a plurality ofconcavo-convex disks, may be advantageously employed. in connection withgraders-and. like structures for smoothing, scarifying, mixing andplaning road surfaces and for cutting and disking earth and the like asset forth'in my Patent No. 1,996,676, granted April 2,1935.

Disking devices of this character have been employed in connection withgraders in which a scraper blade or mold board is suspended beneath themachine by means of a blade supporting structure including a roughlytriangular framework which is adapted to be raised and lowered to raiseand lower the blade and a circle or a bull ring which permits the bladeto be rotated to various positions for sidecasting material to one sideor the other and for pushing the material straight ahead, as inscrapingor bulldozing operations.

In my patent above noted Ihaveprovided a disking means including aplurality of concavoconvex disks which are so supported and mount- .edina unit that they may be substituted for the scraper blade whereby thegrader may be used v for disking operations.

' I have found it very desirable, however, that the disking means bemounted on the supporting mechanism in such manner that the diskingmeans may be used without removingthe scraper blade, and such that thedisking means may be drawn up out of the way to permit the scraper bladeto be used without dismounting the'disking means, and it is accordinglya general object of my invention to provide mounting means of thischaracter,

In practicing my invention I preferably pro.- vide a standardizeddisking mechanism and then provide several fastening members which maybe used interchangeably for fastening the disking means to the grader orlike structure in several positions in front of and in back of themoldboard of the grader. One set of fastening means is adapted to supportthe disking means from the circle hangers or rams horns, which supportsthe mold board, and another set of fastening' means is adapted tosupport the disking means from the circle. The mounting of the diskingmeans in these several positions consti tute some of the general objectsof my invention.

to provide a new and improved means for mounting a disking means onaroad grader or the'like. Another object of my invention is to providean improved means for mounting the disking device in relation to theblade supporting framework of a grader in such manner that the graderblade may be employed without removing the disking device from themachine.

Another object of my invention is to provide an improved means formounting the disking means on the blade supporting framework of a graderor the like. I

One of the features ofmyinvention .is that the scraper blade itself maybe employed as an additional stiffening means for the disking device.

Other and further features and objects of the invention will be moreapparent to those skilled in the'art upon a consideration of theaccompanying drawings and following specification,

wherein is disclosed a single exemplary embodiment of the invention,with the understanding, however, that such changes may be made as fallwithin the scope of the appended claims, without departing from thespirit of the invention.

Figure l is a view in perspective of a disking devicev and a mountingmeans therefor, as it appears when mounted on the blade supportingframework of a grad-er or the like. The disking means is-mounted to therear of the scraper blade and may be raised and lowered as hereinafterdescribed.

Figure 2 is a partial View in elevation of the device shown in Figure 1and parts of the structure have been broken away to show the remain ingstructure in greater detail.

.Figure 3 is a fragmentary view showing a modified means of spacing theyoke member fromthe rams horns rather than from the scraper blade asshown in Figure 1. I Figure 4 is a partial view in perspective'of thethe yoke member to the upper edge of the mold board.

Figure 8 is a view in perspective of the disking means and means formounting the disking unit directly on the circle without engaging it tothe mold board, and

Figure 9 is a partial view in side elevation of the device shown inFigure 8.

Referring to the drawings and particularly to Figure 8 a grader or motorpatrol structure commonly known to the art, includes a heavy framework,indicated generally at In, and in accordance with the usual practice,this framework is supported by tandem wheels (not shown) at the frontthereof and at the rear by means of a pair of drive wheels (not shown),the operators' position being approximately over the rear Wheels and themotor (not shown) being mounted in front of the rear wheels andsupported by the supporting framework It].

In devices of this character a roughly triangular, blade-supportingframework, indicated generally at H, is pivotally engaged to the framemembers Ill near the front thereof and is adapted to be supported at therear end of the triangular frame H and moved up and down by means ofsupporting members indicated generally at I2. These supporting membersinclude screw-threaded jacks or the like, pivotally connected betweenthe frame In and the blade supporting framework II.

The supporting framework II is adapted to engage and support in turn acircle or bull ring [3, which is suspended beneath the framework II, bysupporting means which permit the "circle to rotate.

Rotation of the circle [3 isaccomplished by means of a geared circledrive indicated at I 4 and the circle drive is driven by means of ashaft IS in accordance with the usual practice.

The scraper blade or mold board I! is supported beneath the circle bymeans of a pair of hangers or ra'ms horns" l8, there being one of thesehorns on each side of the circle. The mold board is pivotally engaged tothe lowermost ends of the rams horns by means of brackets l9, engaged tothe rear of the mold board, and by pins 2|, which pivotally engaged thebrackets and mold boards to the lower end of the rams horns.

The angle of incidence of the mold board I! may be adjusted by pivotingthe mold board on the pivotal connection at H! and 2| and it may be heldin any desired position by means of slotted arms 22, which are pivotallyattached to the upper rear edge of the mold board by means of brackets23 and pins 24. The slotted portion of the arm 22 is adapted to beadjustably engaged to intermediate portions of the rams horns [8 bymeans of bolts 26, which are passed through the slots 2'! in the arms22, and which are threaded into the rams horns l8.

The structure so far described is one of the structures commonly knownto the art and these devices are called by the general name of gradersor road patrols. Obviously they are adapted for scraping operationsonly, including sidecasting of earth and snow and the like to one sideor the other or pushing it ahead, which is generally termed a scrapingor bulldozing operation.

It is my purpose to provide easily adjustable disking devices which maybe readily attached in front of or to the rear of the scraper blade ormold board and which may be used either in conjunction with the scraperblade for disking material before or after the scraping operation isaccomplished, or which may be dropped to a level below the scraper bladeand held in this position so that the road patrol may be used forvarious disking operations without removing the mold board from the roadpatrol.

I preferably employ a one-piece yoke member such as illustrated moreparticularly in Figure 6 for supporting the disks. This yoke member 3|is comprised of a long channel-like member am having roughly triangularplate members 3H) and 3lc at the opposite ends thereof. These platemembers are additionally braced by means of U-shaped brackets 3Id. Theside plates 31b and Mo are provided with wide slots 31c and 3|) whichare adapted to receive the through shaft upon which the concavo-convexdisks are mounted. The end plates 31b and 310 are provided with aplurality of openings 31g at their lower edges for a purpose to behereinafter more particularly explained.

The concave-convex disks 32 are mounted on a through-shaft 33 (Fig. 4)and are spacedby means of suitable spacers (not shown). Thethrough-shaft 33 is square at that portion which engages the disks andthe openings through the disks are also square in order that the disksmay be caused to revolve with the shaft. The through-shaft is engaged atits ends in roller bearings, indicated at 34, and these roller bearingsare supported within bearing cages 36, which are in turn mounted on theend plates 3 lb and 3 is by means of bolts 31. It is apparent, byinspection of Figures 4 and 6, that all that is necessary in order toremove the disk assembly from the yoke member is to remove thebolts 31and let the disk assembly and shaft 33 drop down out of the slots 3Ieand 3!). End play of the shaft is regulated by means of lock washer 38in accordance with the usual practice.

I-preferably utilize the disking unit just described as a standardizedunit and provide various brackets and the like for mounting this diskingunit in front of or in the rear of the blade and either on the blade oron the circle 2 and rams horn structures. The mounting means comprisessubstantially two types of devices, namely bracket means for pivotallyengaging the yoke of the disking unit to the road grader, and link meansfor adjustably securing the disking unit in various positions ofadjustment with reference to the scraper blade and circle. The face ofthe channel member 31a is provided with two pairs of spaced bracketmembers 41 (see Fig. 2), which bracket members are welded in spacedrelation to the channel member am.

In fastening the disking unit to the rear of the scraper blade, asillustrated in Figures 1 and 2, I

preferably provide a pair of oppositely-disposed, roughly-triangularbracket members 42 which are provided with right angle flanges 43, theflanges 43 being adapted to be received on the rear sides of angle ironbrackets 44 and 36. These bracing members 44 and 46 are used for bracingthe horns I8, the angle iron M being a through member extending beneaththe circle l3 and secured to it by means of oppositely disposed brackets41.

The inner sides of the horns l8 are provided with angle iron brackets38, which are bolted or riveted to the horns by means of rivets El andare also bolted or welded to the rear vertical faces of. angle irons 48.The members .45 are brace members secured at their inner ends to down;Likewise rotation ofthe circle j the member 44" and at the outer endstothe supports 48.

The triangular brackets 42, stated, are-engaged" ontherearsides'ofithemem- 'bers M- andfd, and plates 52 are provided atthe front sidesof members and .46, theflanges 43 of brackets 62 beingbolted to theseplates; thus clamping the flanges tightly against-thebracing members d l -and it.

In this manner; and by: means of a pivotal connection between thebrackets 4 l-and the At times it is desirablethat'the" disking unit beraised above the lower or cutting edge of the more board I! and this isaccomplished by the use ofclevismembers 53- andspacer rods 542. Theclevis members 53 are pivot-ally engaged at their forward ends, by'meansof" pins to brackets SFon therear'lower edge of the' mold board ll.

The clevismembers 53 are hollow and are adapted to receive the rods 54'.The; bent ends 540. of the rods; 56 are received'in' any of the thecutting edge of the mold board ll. When it is desired to use the diskingunit, the spacer rods 54 are removed and the clevis portions 53aof theclevis members 53 are pinned to one of each of the openings 3lg, thedisking unit thus being pivoted downward so that the lower edges of the.disks are well below the cutting edge of the mold board l1 and the disksmay thus be made to engage the surface of the ground. The disking unitmay be raised and lowered and rotated at will by the same mechanism usedto raise and lower and rotate the mold board.

I may mount the disking unit onv the front of the mold board I! bymodified forms of brackets such as illustrated in Figures 4 and 5. Thebrackets 4|, on the channel member 3|, are the same as previouslydescribed but a modified form of bracket is used in place of brackets42. This modified form of bracket is illustrated more particularly at Elin Figure '7 and comprises a pair of ear members Gla, joined by a plateBlb. The

ears are drilled to receive a through-bolt 62 which is received in thebrackets M and thus the brackets 4| are pivotally attached to thedisking unit. The bracket 5| is slotted, as indicated at Sic, to receivethe upper edge of the mold board I! and in engaging the bracket 6| tothe mold board, the brackets are placed on the mold board with the slots6 is over the upper edge of the mold board and the brackets 6| are thenlocked in place on the mold board by means of set screws 63.

The means for holding the disking unit in raised or lowered positionwith reference to the mold board and circle is substantially the same aspreviously described and includes clevis members 53 in which rods 54 maybe inserted. The brackets or ears 51a are placed on the front of themold board andare a part of straps 64 which are secured to the front ofthe mold board, as by bolts 56, and these straps constitute means forengaging the cutting edge 65 of the mold board to the main portion ll ofthe board. It is apparent that the disking device may be held in raisedposition by inserting the spacer rods 54 in the openings 3lg and theother ends of the previously rodsin 'the cl'evism'embers 53Whenit-isJnecessar-y' to use the disking unit, thero'ds 54: areren'roved and the clevis members directlwengaged between the end: plates3 l band: 3 10 and: the: mold board" l1.

have! illustrated, in Figure 8: and: 9, "armeans for supporting-thedisking unitdirectly on: the circle without engaging the mold board: 11:and, in this, structure. the brackets 4 are ,pivotally engaged tosuitable opposed bracket members .161

. These-brackets Eililike the brackets 45;; are sejcured directly tothe. circle. Obviously the disk: ing device may'pi vot about onlthebrackets: H. as before. Substantially the same spacingmembers areutilized for holding the di'skingunit in raisedand lowered position:an-d these spacing means'includ'e c:levis "members- 58 and spacer rods6'9. 'lli h'e r the rods E9 are inserted in theclevis mem hers: G3 thedisking" unitis supported in the position showrrin Figures-8 a-ndYQ withthe'lowere'd'ges ofi the disks above thecutting edge ofthe scraper bladeI'I' When it is necessary-tense the disking v unit the spacer rods: 69":are removed and the clev-is members 68 engaged 'di'rectly in the open.-ingsdlg thereby rotating the disking unit to a position in which thelower edges of the disks are below the cutting-edge of the scraperblade. If necessary the scraper blade Hamay be pivoted on thepivotsZ-lwith the upper edge of the blade close tothe' horns 18 so that thecutting edge 0 the blade is slightly raised. a I

It is possible to mount the disking unit, by means of the mountingdevice shown in Fige ure 1, so that. the disking unit does not engagethe scraper blade at any point and this is accomplished by means of themodified structure shown in Figure 3'in which the clevis members 53a.are bent in S-shape so that they engage the pins 2| instead of the pinsat 56. The disking unit, as shown in Figure 1, may thus be entirelydisengaged from the scraper blade and the scraper blade removed ifdesired.

It is apparent that I have provided a simple and easily adjusted diskingunit which may be readily assembled and disassembled and that I haveprovided a unit of this character which may be readily attached in frontof or to the rear of the scraper blade or on the circle or horns of amotor patrol or like grader device. The disk ing. unit in all itspositions of attachment, may be readily raised and lowered without thenecessity of disturbing the mold board. It is apparent thatmodifications of my invention may be made by those skilled in the art.Such modifications may be made without departing from the spirit andscope of my invention as set forth in the appended claims.

I claim as my invention: 1. On a motor patrol, an earth moving anworking device including a supporting structure, a mold board mounted onthe supporting structure, a disking unit comprising a yoke member havingend plates at either end thereof, the yoke member being adapted to carrythe shaft of the disking device, the yoke member being provided the yokemember, and connecting means fastening the disking device to thesupporting structure, said connecting means comprising bracket membersadapted to connect with the hangers of the circle and spacing membersadapted to rigidly connect the yoke and the mold board.

4. In a disking attachment for motor patrols, the motor patrol having amold board. mounted thereon, the said motor patrols including a circleand depending hangers on the circle, a disking device including a yokemember, clamps connected to the hangers including, reinforcing memberspivotally connected to the yoke, and spacing members engaged to the endplates of the yoke member and to the lower end of the mold board.

5. In a disking attachment for motor patrols, the motor patrol having amold'board and supporting structure for same, the disking deviceincluding a yoke member and disks rotatably mounted on the yoke member,means for attaching the disking device at the rear of the mold the yoketo the supporting structure and spacing means attached to the rear ofthe mold board and to a portion of the disking device.

6. In a disking device for attachment to a motor patrol the motor patrolincluding a circle, rams horns, a mold board, and reinforcing membersfor the rams horns, means for attaching the disking deviceincludingbrackets adapted to be engaged on-the reinforcing members ofthe rams horns and spacing members engaged betweenthe disking device andthe rear of the mold board. a l

7. Ina motor patrol, an earth working device including a supportingstructure, a mold board attached thereto, a disking device comprising ayoke and disks rotatably mounted within the yoke, means for pivotallyattaching the yoke to the supporting structure, the ends of theyoke'opposite the pivotal point having a plurality of ad- ,justmentholes, and other means including a-pivotally mounted bar connected withsaid adjustment holes and with the mold board for spacing the diskingdevice about its pivotal connection whereby the disking deviceis'independently rotatable on the pivotal means to provide a pluralityof positions for the disking device with respect to the supportingstructure and the mold board.

- FRED M. HARGRAVE. v

